The doc sounds as if she were unsure herself and giving you a hard time because of that. Too often inexperienced SHOs are left to get on with it in Casualty, afraid to call in the Registrar, let alone the Consultant, or the specialty teams, because of being branded "unable to cope". It's the docs macho culture at its worst. I have heard junior doctors refuse to help their peers with advice, when there is a dodgy X-Ray or ECG to be interpreted, saying "I'm not propping him/her up, let him/her paddle their own canoe" or words to that effect. Sadly, nursing seems to be going the same way.